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Subject: Re: Which program finds 1.e7?

Author: Hans van der Zijden

Date: 16:11:28 01/12/02

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On January 11, 2002 at 16:42:15, Michael Schmolei wrote:

>I have already checked a few programs, they don't find it inside 7-8 minutes.
>Perhaps with faster hardware....?
>A study from Kazantsev
>
>[D]1R6/5p2/4P1pb/2K4p/2pB1N1k/4P3/6PP/2q5 w - -
>
>
>http://members.tripod.de/Michaels_Schachpage
Nieuwe partij Invoeren
1R6/5p2/4P1pb/2K4p/2pB1N1k/4P3/6PP/2q5 w - - 0 1


Fritz only needs 2:19:59 to find e7 on an AMD 1200.
Analysis by Fritz 7:

1.exf7 Qa3+ 2.Kd5 Qa5+ 3.Kd6 Qf5 4.g3+ Kg4 5.Ke7
  +-  (1.57)   Diepte: 6/25   00:00:00  161kN
1.exf7 Qa3+ 2.Kd5 Qa5+ 3.Ke6 Qf5+ 4.Ke7 Qe4+ 5.Ne6 Qxg2 6.Be5
  +-  (1.50)   Diepte: 7/26   00:00:00  233kN
1.exf7 Qa3+ 2.Kd5 Qa5+ 3.Ke6 Qf5+ 4.Ke7 Qe4+ 5.Ne6 Qxg2 6.Bf6+ g5 7.Be5
  +-  (1.41)   Diepte: 8/29   00:00:01  760kN
1.exf7 Qa3+ 2.Kd5 c3 3.Nxg6+ Kg5 4.f8Q Bxf8 5.Nxf8 c2 6.Ne6+ Kg4
  ±  (1.25)   Diepte: 9/29   00:00:04  3045kN
1.exf7 Qa3+ 2.Kd5 c3 3.Nxg6+ Kg5 4.f8Q Bxf8 5.Nxf8 c2 6.Ne6+
  ±  (1.32)   Diepte: 10/32   00:00:11  7625kN
1.exf7!
  +-  (1.60)   Diepte: 11/35   00:00:38  26494kN
1.exf7 Qa3+ 2.Kd5 c3 3.Ke4 Qa6 4.g3+ Kg4 5.Rb6 Qa8+ 6.Nd5 c2 7.Rxg6+
  +-  (1.54)   Diepte: 12/35   00:01:28  61571kN
1.exf7!
  +-  (1.82)   Diepte: 13/36   00:02:53  121463kN
1.exf7 Qa3+ 2.Kd5 c3 3.Nxg6+ Kg5 4.Ne5 h4 5.Rg8+ Kh5 6.Nd7 Qb3+ 7.Ke5 Qb5+
  +-  (1.85)   Diepte: 13/37   00:03:45  158703kN
1.exf7--
  +-  (1.57)   Diepte: 14/39   00:08:49  373745kN
1.exf7 Qa3+ 2.Kd5 c3 3.Ke4 Qa6 4.Rb6 Qa8+ 5.Nd5 Qa2 6.Bf6+ Kg4 7.Bxc3
  ±  (1.35)   Diepte: 14/41   00:15:12  646185kN
1.exf7 Qa3+ 2.Kd5 c3 3.Ke4 Qa6 4.Rb6 Qa8+ 5.Nd5 Qa4 6.Kd3 c2 7.Bf6+
  ±  (1.29)   Diepte: 15/44   00:34:21  1463047kN
1.exf7 Qa3+ 2.Kd5 c3 3.Nxg6+ Kg5 4.Ne5 Qa2+ 5.Nc4 Kg6 6.f8Q
  ±  (1.16)   Diepte: 16/45   01:38:11  4167912kN
1.e7!
  ±  (1.19)   Diepte: 16/45   02:19:59  5899567kN
1.e7 Qa3+ 2.Rb4 Qa7+ 3.Kxc4 Qxe7 4.Nxg6+ fxg6 5.Bf6+ Qxf6 6.Kd5+
  ±  (1.29)   Diepte: 16/45   02:23:38  6047502kN

Hans.



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